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Finding the Fourth Proportional to 508,136.28, 762,203.46 and 280,420.86

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Solution

The fourth proportional to 508,136.28, 762,203.46 and 280,420.86 is: 420,630.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,136.28 : 762,203.46 = 280,420.86 : x
  2. Step 2: Convert to fraction form
    508,136.28/762,203.46 = 280,420.86/x
  3. Step 3: Cross multiply
    508,136.28x = 762,203.46 × 280,420.86
  4. Step 4: Simplify right side
    508,136.28x = 213,737,749,748.18
  5. Step 5: Solve for x
    x = 213,737,749,748.18/508,136.28
  6. Step 6: Final answer
    x = 420,630.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.